you could rent out a room though?

but you also have a much improved quality of life as a result of that property value going up, because theres more desirable stuff around

Being stressed about finding the money to make your payments is probably not a much improved quality of life. And they probably picked the place cause they liked it as it was, so don't be so sure about appreciation of those new developments anyway...

Why should I get to have that sort of externality on others just because I have more money than them?